利用异醇铝溶液的燃烧化学沉积纳米α-Al_2O_3膜

Combustion chemical deposition of nanostructured α - Al_2O_3 film with isoalcohol-aluminium solution

提出了直接在空气中沉积纳米陶瓷薄膜的新方法——燃烧化学沉积法.以沉积α-Al2O3为例,通过完全燃烧计算、初始液体雾化试验和燃烧温度及质量密度试验,确定了燃气、易燃溶剂种类及雾化喷口尺寸和压力.用该参数在Ni-Al合金上沉积出纳米α—Al2O3薄膜,并用二次加热法进行了晶化处理.研究表明:用上述方法能够成功地制备完整的纳米α-Al2O3薄膜.

A new method for preparation of nanostructured ceramic film （coating） is proposed. The initial liquid which was prepared by dissolving organo-metallic compound into inflammable dissolvent was atomized and burned in the air, and hence nanostructured ceramic film was deposited, α-Al2O3 was tested with isoalcoholaluminium solution. Combustion gas, inflammable dissolvent, the size and pressure of atomization spout were determined by the complete combustion calculation, the experimental atomization of initial liquid and experiments of combustion temperature and mass density. As a result, α-Al2O3 film had been deposited and further crystallized by heating. The conclusion is that the ideal crystallization, surface appearance, microstructure of nanostruetured α-Al2O3 film is found in the experimental results by XRD,SEM and TEM.